Rustproofing process and compound



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UNITED sures PATENT- orries.

E. ABRAHAM, F DETROIT, MICHIGAN.

BUSIPEOOFING PROCESS AND COMYOUND.

Ho Drawing. Original application filed Kay 10, 1917, Serial li'o.167,857. Divided and this application filed January 18, 1918, Serial No.212,409. Renewed April 8, 1923. v

To all whom it may comm:

Be it known that I, Cmmms E. ABRAHAM, a citizen of-the United States ofAmerica, residing at Detroit, in the county of Wayne 5 and State ofMichigan, have invented certain new and useful Improvements inRustproofing Processes and Compounds, of which the following is aspecification.

This invention relates to a rust-proofing process and formula and refersmore particularly to a process and formula which will effectivelyproduce or cause to be produced on ferrous metals or their alloys aprotective rust-resisting film or coatin I Among the objects of theinvention are to provide an improved process and formula whereby theferrous metals or their alloys can be efiiciently and economicallyrustproofed; to provide a compound and process which will be moreeffective for rust-proof ing purposes than those now in use and whicwill permit the rust-proofing without 'bu'fling or otherwise treatingthe metal before applyin the formula; and in a general to provi e a newand improved processand formula of the character above referred to.

I While the invention in its broader aspects is not limited to thearticular substances or proportions specific except as ultimately setforth in the claims, I have found that a compound formed and applied asfollows is particularly effective in' rust-proofing iron, steel or thelike; these ingredients being 86 used in substantially the fo owingproportions:

Barium nitrate 18 oz. Zinc oxide 9 oz. o Antimony trioxide 7 oz.

Oxalic acid 4 oz. Phosphoric acid 5 oz. Water 40gal.

The above solution is heated to the boiling point and maintained at thistem rature while the articleto be rustroof is subjected to the action ofthis ath from a proximately 40 minutes to two and one-h f hours;according to the. hardness of the metal to be treated.

In general the process is one in which zinc oxide,wantimony trioxide,barium nitrate, oxalic acid and phosphoric acid are mixed with water insubstantially such quantity and proportions as shown in the aboveforcompounds in place of zinc oxide; or manganese or strontium nitratesin lace of barium nitrate; or phosphoric aci in place of oxalic acid inthe presence of antimony, oxide of antimony or other compounds ofantimony will produce a similar rust-protective coat to ferrousmetalswhen treated as outlined. Also the proportions and quantities ofthe several materials-may be v ar1ed within practical limits and in thisway a coating of different shades of color and of density may beobtained, but with substantially thesame rust-resisting 'pr'o erties..However, the formula substantially as given aboiie I have found hasproduced very good resu ts.

Therefore, I believe I am the first to employ for the rust-proofing offerrous metals .ing the following substances: Barium nitrate, zincoxide, antimony trioxide, oxalic ac 4d,:pll11osphoric acid, water.

, 95 e process of rust-proofing articles of bmri nitmtii zinc one,

-mony and a normal auto y,= a relatively or phhoric mi and normally mstin:

' 7. A rust-@poofing composition cont 2 11;:- mtony and a normally rustwhich copr oxide, oxalic aci waiter;

which comprises subjecting them to an mm unified bath containin aco mdiofi $iy m pg 00m pad and the heming mi ndl Eaafilm

